Protective plate



FIG. 1 is a top view of a protective plate showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a rear isometric view thereof; and,

FIG. 7 is a front isometric view thereof.

The broken line showing of the shafts of the hardware elements is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a protective plate, as shown and described. 